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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 298 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.44 × 15 =
  2. 2.26 × 15 =
  3. 3.31 × 15 =
  4. 4.28 × 15 =
  5. 5.63 × 15 =
  6. 6.62 × 15 =
  7. 7.15 × 15 =
  8. 8.36 × 15 =
  9. 9.7 × 15 =
  10. 10.44 × 15 =
  11. 11.18 × 15 =
  12. 12.23 × 15 =
  13. 13.44 × 15 =
  14. 14.51 × 15 =
  15. 15.42 × 15 =
  16. 16.15 × 15 =
  17. 17.55 × 15 =
  18. 18.11 × 15 =
  19. 19.13 × 15 =
  20. 20.32 × 15 =
  21. 21.21 × 15 =
  22. 22.9 × 15 =
  23. 23.59 × 15 =
  24. 24.17 × 15 =
  25. 25.44 × 15 =
  26. 26.62 × 15 =
  27. 27.30 × 15 =
  28. 28.8 × 15 =
  29. 29.39 × 15 =
  30. 30.20 × 15 =
  31. 31.64 × 15 =
  32. 32.20 × 15 =
  33. 33.5 × 15 =
  34. 34.57 × 15 =
  35. 35.14 × 15 =
  36. 36.33 × 15 =
  37. 37.4 × 15 =
  38. 38.20 × 15 =
  39. 39.20 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 660
  2. 390
  3. 465
  4. 420
  5. 945
  6. 930
  7. 225
  8. 540
  9. 105
  10. 660
  11. 270
  12. 345
  13. 660
  14. 765
  15. 630
  16. 225
  17. 825
  18. 165
  19. 195
  20. 480
  21. 315
  22. 135
  23. 885
  24. 255
  25. 660
  26. 930
  27. 450
  28. 120
  29. 585
  30. 300
  31. 960
  32. 300
  33. 75
  34. 855
  35. 210
  36. 495
  37. 60
  38. 300
  39. 300
  40. 75

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